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1·If undelivered, please return to sender.

若无法投递，请退还寄信人。

2·If undelivered, return to sender, eg on a letter.

寄件人的姓名和地址应该写在背面。

3·Assist purchasing clerk to urge the shipment of the undelivered goods.

协助采购催收应到而未到的物品。

4·I don't like the idea of substituting Type No. 15 for the portion undelivered.

我区别意未交货部分成改用15型代替。

5·I have been trying to reach you as my earlier mails were returned undelivered.

我一直在试图达成你为我刚才的邮件被退回。

6·I don't like the idea of substituting something else in place of the undelivered goods.

我不同意未交货部分用其他东西代替。

7·Are undelivered payroll checks forwarded to an appropriate official after a specified period of time?

对于未能发出的工资支票，是否在规定的时间后交给指定的管理人员？

8·To ensure prompt delivery of all supplies and to follow up outstanding orders and undelivered portion.

确保所有供应物品及时到货并跟进未解决的订单和未送达的物品。

9·Undelivered messages may be placed on error queues, interpretation of such messages requires contextual information.

未交付的消息可能放置在错误队列上，每个此类消息的解释都要求使用上下文信息。

10·Unearned revenue due to undelivered elements is recognized ratably on a straight-line basis over the related product ' s life cycle.

尚未完成交付而记入不应得的收入账目的金额应采用相关产品的生命周期直线法来应征税收。